题目内容
--- May I call you at 9 o’clock tomorrow morning?
--- No problem, I _________ be free at that time.
A. should B. shall C. can D. may
A

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题目内容
--- May I call you at 9 o’clock tomorrow morning?
--- No problem, I _________ be free at that time.
A. should B. shall C. can D. may
A